Portable charger



FIG. 1 is a left side bottom perspective view of our new design for a portable charger;

FIG. 2 is a right side top perspective view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a bottom view of FIG. 1;

FIG. 5 is a front elevational view of FIG. 1;

FIG. 6 is a back elevational view of FIG. 1;

FIG. 7 is a left side view of FIG. 5; and,

FIG. 8 is a right side view of FIG. 5.

The broken lines illustrate environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a portable charger, as shown and described. 